Edison was more interested in the sale of Kinetoscopes(for roughly $1,000 apiece)to these parlors than in the films that would be run in them (which cost approximately $10 to $15 each).He refused to develop projection technology,reasoning that if he made and sold projectors,then exhibition would purchase only one machine-a projector-from him instead of several.

Edison was more interested in the sale to these parlors than in the films.He refused to develop projection technology,因为 if he made and sold projectors,then exhibition would purchase only one machine-a projector-from him instead of several.

-========================================================================

Which of sentences below best expression the essential information in the highlighted sentence in the passage?Incorrect choices change the meaning in important ways or leave out essential information.

1. Edison was more interested in developing a variety of machines than in developing a technology based on only one.---错误，Edison was more interested in贵than in便宜.
2. Edison refused to work on projection technology because he did not think exhibitors would replace their projectors with newer machines.----错误，不是replace而是sell
3. Edison did not want to develop projection technology because it limited the number of machines he could sell.

--- purchase only one machine-a projector-from him instead of several.

1. Edison would not develop projection technology unless exhibitors agreed to purchase more than one projector from him.---错，逻辑关系不是如果，逻辑关系是因果

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